
When you ask "What number is halfway between 42 and 271?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=42 and Y=271.

To find the number halfway between 42 and 271, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 271 into our formula, we get:
(42 + 271)/2 = 156.5
Thus, the number halfway between 42 and 271 is 156.5.
To check that our answer is correct, we subtract 42 from 156.5 and subtract 156.5 from 271 and compare the two numbers:
156.5 - 42 = 114.5
271 - 156.5 = 114.5
As you can see, the halfway number is 114.5 higher than 42 and 114.5 lower than 271. Therefore, our halfway between answer of 156.5 above is correct.
Halfway Between
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Halfway Between 42 and 272
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